{"product_id":"creality-cfs-photoelectric-board","title":"Creality CFS photoelectric board","description":"\u003cdiv class=\"product-description\"\u003e\n\n\u003cp\u003eYour K2 Plus pauses on a colour change and the screen shows FR2835: filament may be stuck from loader to CFS hub. You pull the tube, the filament is sitting right there, and it still will not load. Or the CFS insists a slot is loaded when it is empty. When the hub cannot see filament, the whole multi-colour system stops trusting itself.\u003c\/p\u003e\n\u003cp\u003eThe Creality CFS photoelectric board is the small sensor board at the hub outlet in the base of the Creality Filament System. It tells the CFS when filament has reached the hub, and when it has cleared it again.\u003c\/p\u003e\n\u003cp\u003eReplace a faulty CFS photoelectric board and the CFS goes back to loading, retracting and swapping colours on its own.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGenuine Creality part 2101020333 | Hub outlet filament detection | Optical, no moving contacts | Fits the Creality CFS for K2 series and Hi | Clears hub detection errors | Plug-in board replacement | Local stock in South Africa\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWho the Creality CFS photoelectric board is built for\u003c\/h2\u003e\n\n\u003ch3\u003eThe K2 Plus owner stuck on a hub error\u003c\/h3\u003e\n\u003cp\u003eYou run a \u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/creality-k2-plus-3d-printer-with-cfs-combo\"\u003eK2 Plus Combo\u003c\/a\u003e and multi-colour jobs keep failing at the hub. If you have already cleared the PTFE path and the error comes back on a clean, free-running filament, the hub sensor itself is the likely fault. This board is the exact factory part, so a swap restores normal detection without touching firmware. Replace it in an afternoon and run a four-colour logo plate the same night.\u003c\/p\u003e\n\n\u003ch3\u003eThe small print farm operator\u003c\/h3\u003e\n\u003cp\u003eA CFS that throws false feed errors stops a printer mid-job, often overnight, and you only find out in the morning. Keeping a spare CFS photoelectric board on the shelf turns that into a quick board swap instead of a week offline while you wait for parts. Because it is the genuine board, the replacement behaves exactly like the sensors in your other units, so your load and retract routines stay predictable across the fleet.\u003c\/p\u003e\n\n\u003ch3\u003eThe school or makerspace technician\u003c\/h3\u003e\n\u003cp\u003eShared printers see heavy use and a lot of hands. Filament gets forced into the wrong slot, and dust and debris build up in the base of the CFS. When a hub sensor fails, you need a cheap, specific part rather than a whole new CFS unit. This board lets you repair the unit you already own, and the CFS error codes point you straight at it, which makes it a good repair job for learners.\u003c\/p\u003e\n\n\u003ch2\u003eWhat sets the CFS photoelectric board apart\u003c\/h2\u003e\n\n\u003ch3\u003eIt is the checkpoint every filament passes through\u003c\/h3\u003e\n\u003cp\u003eThe CFS sends up to four filaments into one hub, and from there a single PTFE tube runs to the extruder. This board sits at the hub outlet and detects whether filament is present. During pre-feeding, the feeder pushes new filament forward until the hub sensor sees it, then pulls it back slightly to tension the spool. During unloading, the CFS keeps retracting until the sensor reports the hub is clear. Every load, retract and colour swap depends on that one signal being correct.\u003c\/p\u003e\n\n\u003ch3\u003eOptical sensing that does not wear like a switch\u003c\/h3\u003e\n\u003cp\u003eThis is a \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Photoelectric_sensor\"\u003ephotoelectric sensor\u003c\/a\u003e: the filament breaks a light beam instead of pressing a mechanical lever. There is no spring to fatigue and no contact to wear, which suits a part that triggers on every single filament change. Creality lists it as a detection board only, with no motor drive and no main control on the board. The CFS mainboard does the thinking, and this board simply reports what it sees.\u003c\/p\u003e\n\n\u003ch3\u003eThe error codes tell you when it is the culprit\u003c\/h3\u003e\n\u003cp\u003eCreality's CFS error table names the hub detector directly in several faults. FR2835 means filament did not trigger the hub detector while feeding. FR2849 means the hub detector stayed triggered after the filament was pulled back. FR2850 means the hub detected filament from a slot that was not being unloaded. Each can also come from a jam or high friction in the PTFE path, so rule those out first. If the error persists with a clear path, a faulty board is the likely cause.\u003c\/p\u003e\n\n\u003ch3\u003eKnow which part you actually need\u003c\/h3\u003e\n\u003cp\u003eThe CFS and printer use several filament sensors and boards, and owners often order the wrong one. The table below shows where each part sits.\u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003ePart\u003c\/th\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003eWhere it sits\u003c\/th\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003eWhat it does\u003c\/th\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003eTypical related errors\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCFS photoelectric board (this part)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCFS hub outlet\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eDetects filament at the hub\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFR2835, FR2849, FR2850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/creality-k2-plus-material-break-detection-module\"\u003eK2 Plus Material Break Detection Module\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003ePrinter extruder\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eDetects filament at the extruder\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFR2836\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/cfs-bottom-bracket\"\u003eCFS bottom bracket\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCFS base\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFive-way hub that merges four filament paths into one\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFR2848, FO2838\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/creality-cfs-system-motherboard\"\u003eCFS System Motherboard\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eInside the CFS\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eControls the CFS and reads all its sensors\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFS2834, FS2858\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFull specifications: CFS photoelectric board\u003c\/h2\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003eSpec\u003c\/th\u003e\n\u003cth style=\"padding: 6px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eRole\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eHub outlet filament detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eSensing method\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003ePhotoelectric (optical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eMotor drive\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eMain control\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eNone, reports to the CFS mainboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFilament diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e1.75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003cstrong\u003eHardware\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCreality\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCreality part number\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e2101020333\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eStore SKU\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCRE740\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\n\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Printed_circuit_board\"\u003ePrinted circuit board\u003c\/a\u003e assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eLocation\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCFS hub outlet, base of the unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCreality CFS (Creality Filament System)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003ePrinters using the CFS\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eK2 Plus, K2 Pro, K2, Hi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eNot for\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eCFS-C (K1 series), CFS Lite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003cstrong\u003eSoftware\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFirmware changes\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eNone required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px;\"\u003eRelated error codes\u003c\/td\u003e\n\u003ctd style=\"padding: 6px;\"\u003eFR2835, FR2849, FR2850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOrdering, shipping and support for your CFS photoelectric board\u003c\/h2\u003e\n\u003cp\u003eWe ship the CFS photoelectric board by courier anywhere in South Africa, or you can collect it from our Centurion or Boksburg store. Warranty claims are handled locally by our team. Our technicians can help you work out from the error code whether you need this board or another part. We also stock \u003ca href=\"https:\/\/3dprintingstore.co.za\/collections\/3d-printing\/3D-Printer-Spare-Parts+Creality\"\u003eCreality spare parts\u003c\/a\u003e for the CFS and K2 series.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions about the CFS photoelectric board\u003c\/h2\u003e\n\n\u003ch3\u003eIs this the same as the K2 Plus filament runout sensor?\u003c\/h3\u003e\n\u003cp\u003eNo, they are two different sensors. This board detects filament at the CFS hub outlet. The \u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/creality-k2-plus-material-break-detection-module\"\u003eK2 Plus Material Break Detection Module\u003c\/a\u003e detects filament at the extruder. FR2835 usually points to the hub side, while FR2836 usually points to the extruder side.\u003c\/p\u003e\n\n\u003ch3\u003eDoes it work with the CFS-C for K1 printers?\u003c\/h3\u003e\n\u003cp\u003eNo, this board is for the standard Creality CFS used with the K2 series and the Hi. The \u003ca href=\"https:\/\/3dprintingstore.co.za\/products\/creality-cfs-c-4-filament-dispenser-for-k1-series\"\u003eCFS-C for the K1 series\u003c\/a\u003e and the CFS Lite have different hardware. Check which unit you have before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eHow hard is it to replace?\u003c\/h3\u003e\n\u003cp\u003eIt is a simple repair if you are comfortable with screwdrivers and small connectors. Unplug the CFS and remove the PTFE tubes. Open the base to reach the hub, then swap the board and reconnect its cable. Afterwards, reload a filament to check that pre-feeding stops at the hub as it should.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I stop the hub sensor from failing again?\u003c\/h3\u003e\n\u003cp\u003eKeep the filament path clean and free-running. Trim filament ends cleanly before inserting them, and never force filament into a slot that is not being loaded. Replace worn \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Polytetrafluoroethylene\"\u003ePTFE\u003c\/a\u003e tubes during routine maintenance, because shavings and dust in the base can block or confuse an optical sensor.\u003c\/p\u003e\n\n\u003ch3\u003eIs there local support in South Africa if I am not sure this is the fault?\u003c\/h3\u003e\n\u003cp\u003eYes, \u003ca href=\"https:\/\/3dprintingstore.co.za\/pages\/submit-technical-support-ticket\"\u003esubmit a technical support ticket\u003c\/a\u003e with your error code and what you have already tried. Our team will help you confirm the faulty part before you buy, so you do not replace the wrong board.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Creality","offers":[{"title":"Default Title","offer_id":52649115910431,"sku":"CRE740","price":99.99,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/0800\/0031\/files\/CRE740_741b4098-1789-4af0-86cd-4c60cd2a67d4.png?v=1790149780","url":"https:\/\/3dprintingstore.co.za\/products\/creality-cfs-photoelectric-board","provider":"3D Printing Store","version":"1.0","type":"link"}